australopithecus anamensis characteristics

This species is largely known from teeth and fragmentary pieces of maxillae and mandibles; very limited postcranial material has been recovered (Klein, 1999). The two most important species of Australopithecus were A. afarensis, named after the Afar region of Ethiopia, and A. africanus, which was discovered in South Africa. Fossils attributed to Australopithecus anamensis (which means “southern ape of the lake” from “anam,” meaning “lake” in the Turkana language) have been recovered from sediments at Kanapoi and Allia Bay near Lake Turkana in Kenya. Male height is around 5 feet, while the females are around 4’3”. Au. Distinct characteristics of Australopithecus afarensis are bipedalism (ability to walk on two feet); sexual dimorphism (males being bigger than females); and robust teeth (that implied a plant-based diet). This is a mandible without the ascending rami but with all the teeth present. The australopithecines were relatively small-brained hominids. How Lucy died has never been officially determined. anamensis may be descended from the ardipith lineage or a heretofore undiscovered group. Until now, the earliest Australopithecus anamensis fossils were 3.9 million years old. afarensis, may be descended from Au. Some characteristics: The cranial capacity of the Australopithecus anamensis is unknown. Age: 4.2 - 3.9 million years ago Type specimen: KNM-KP 29281. The species is thought to have been highly sexually dimorphic in body and canine size. The fossils date from between about 3.9 million and 4.2 million years ago. Australopithecus afarensis characteristics. DISCOVERY AND GEOGRAPHIC RANGE. Au. The first fossilized specimen of the species, though not recognized as such at the time, was a single arm bone found in Pliocene strata in the Kanapoi region of East Lake Turkana by a Harvard University research team in 1965. Australopithecines had long, robust arms, similar to those of apes, indicating that they combined their movement on the lower extremities with climbing trees or climbing between branches. Some Au. anamensis have been found were forests and woodlands that grew around lakes. (The most famous specimen of … Get a Britannica Premium subscription and gain access to exclusive content. Its face projected outwards, less so in females than in males. Australopithecus anamensis. INTRODUCTION. Australopithecus anamensis • Leakey, et al., 1995 • Type Specimen KNM-KP 29821 (Adult Mandible, Temporal Fragment) • 4.2 – 3.9 MYA • East Africa. The “Southern Ape of the Lake” was announced in 1995. The top of its skull (the cranial vault) was slightly domed and its brain was comparable in size to a chimpanzee's. Found between 3.85 and 2.95 million years ago in Eastern Africa (Ethiopia, Kenya, Tanzania), this species survived for more than 900,000 years, which is over four times as long as our own species has been around. By Reuters. Sites: All specimens were found east of Lake Turkana. Specimens: KNM-KP 29281, KNM-KP 29283, KNM-KP 29285, KNM-KP 271. anamensis. [13], Australopithecus anamensis is the intermediate species between Ardipithecus ramidus and Australopithecus afarensis and has multiple shared traits with humans and other apes. The sexual dimorphism in their species was quite pronounced, the … Australopithecus anamensis sites. Australopithecus afarensis is one of the longest-lived and best-known early human species—paleoanthropologists have uncovered remains from more than 300 individuals! Australopithecus afarensis, or the “southern ape from Afar,” is a well-known species due to the famous “Lucy” specimen. Nine hominid dental, cranial and postcranial specimens from Kanapoi, Kenya, and 12 specimens from Allia Bay, Kenya, were described as a new species of Australopithecus in the August 17, 1995 issue of Nature. They walked upright on two legs. Ardipithecus-Lived in 5.8 - 4.4 Mya(the end of the Miocene & beginning of the Pliocene epoch)-Probably ancestral to Australopithecus Afarensis-Brain volume was about the size of a modern chimpanzee-Tim White of Berkeley, the anatomist says:"Ramidus is the first species this side of our common ancestor with chimpanzees." The jaws and teeth are the most primitive of any australopith, which is not surprising since it is the oldest. 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